CN100514205C - Sheet carrying unit, image forming apparatus and sheet carrying control method - Google Patents

Sheet carrying unit, image forming apparatus and sheet carrying control method Download PDF

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Publication number
CN100514205C
CN100514205C CNB2006101687365A CN200610168736A CN100514205C CN 100514205 C CN100514205 C CN 100514205C CN B2006101687365 A CNB2006101687365 A CN B2006101687365A CN 200610168736 A CN200610168736 A CN 200610168736A CN 100514205 C CN100514205 C CN 100514205C
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China
Prior art keywords
paper
transmit
type
heavily
stop
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CNB2006101687365A
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Chinese (zh)
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CN1987669A (en
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本桥宗之
岩本强志
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Sharp Corp
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Sharp Corp
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/70—Detecting malfunctions relating to paper handling, e.g. jams
    • G03G15/703—Detecting multiple sheets
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00611—Detector details, e.g. optical detector
    • G03G2215/00637—Acoustic detector

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Manual Feeding Of Sheets (AREA)

Abstract

A sheet carrying unit, which comprises double feed detecting means for detecting double feed of sheets and stopping means for stopping carrying of a sheet based on detection result of the double feed detecting means, comprising accepting means for accepting a type of a sheet to be carried, wherein the stopping means is constructed to stop carrying a sheet based on the type of sheet accepted by the accepting means and detection result of the double feed detecting means.

Description

Paper transfer, image forming apparatus and paper transmission control method
Technical field
The present invention relates to: based on the testing result of multiple sheet feed and stop to transmit the paper transfer of paper; The image forming apparatus that comprises paper transfer; And based on the testing result of multiple sheet feed and stop to transmit the paper transmission control method of paper.
Background technology
At the image forming apparatus that is used on recording chart, forming image, such as printer or have in the compounding machine such as the multiple function of scan function, printing function and facsimile function, recording chart may be through moisture, static etc. and can not one by one separately being transmitted, and during carton or manual feed dish transfer sheet, may take place heavily to send, heavily send to be meant two or many recording charts that overlap each other of transmission.
Therefore, be provided for detecting heavily send heavily send sensor so that detect stop when heavily sending transfer sheet once and the image that stops to comprise exposure-processed, development treatment, transfer process, photographic fixing processing etc. form and handle, discharge recording chart then.Be used as heavily send sensor be, for example, ultrasonic sensor.Since the output level of ultrasonic sensor along with a recording chart and between another formed air-gap change, so can come heavily the sending of detection record paper (seeing Japanese unexamined patented claim 2004-4181 number) based on the change of output level.When using ultrasonic sensor under the situation that keeps contactless state at recording chart, need not the transmission of disturbance records paper and no matter the thickness of recording chart how, can detect heavily and send.
Yet, when be transmitted in its inside have air-gap such as the recording chart of envelope the time, exist such problem, promptly, the output level of the ultrasonic sensor that changes along with a recording chart and the air-gap between another detects owing to heavily sending of recording chart is based on, so heavily send and can stop print processing even also can detect in the process that only transmits a recording chart.In addition; except envelope; when as by adding and adhere in OHP (overhead projector) thin slice that protective sheet makes, the Kent paper of making by two sheet materials are sticked together etc.; recording chart is when portion has air-gap within it, also can detect heavily to send and can stop print processing in the process that only transmits a recording chart.In addition, for be distributed with therein air-gap such as for the recording chart of WASHI (Japan paper), in only transmitting one process, also can detect and heavily send and can stop print processing.Therefore, can take place and carries out image to form the problem of handling.
Summary of the invention
The present invention proposes in order to address the above problem, and an object of the present invention is to provide a kind of paper transfer, a kind of image forming apparatus and a kind of paper transmission control method, they are configured to accept the type of the paper that will transmit, and stop to transmit paper based on the paper type of accepting and the testing result heavily sent, so that change by the processing that stops of heavily sending the paper that causes according to paper type.
Another object of the present invention provides a kind of paper transfer and a kind of image forming apparatus, when its paper type that is formed at acceptance is not predefined type, stop to transmit paper in response to the detection of heavily sending, even so that detecting the paper that does not also stop to transmit predefined type when heavily sending.
Another object of the present invention provides a kind of paper transfer, a kind of image forming apparatus and a kind of paper transmission control method, wherein the paper of predefined type is that portion has the paper of air-gap within it, handle so that can prevent to carry out, and become and to carry out image and form by stopping of causing of the error-detecting of heavily sending.
Another object of the present invention provides a kind of paper transfer and a kind of image forming apparatus, wherein the paper of predefined type is any in envelope, OHP thin slice and the Kent paper, handle so that can prevent to carry out, and become and to carry out image and form by stopping of causing of the error-detecting of heavily sending.
Another object of the present invention provides a kind of paper transfer and a kind of image forming apparatus, they comprise the manual feed dish and are configured to transmit the paper that is placed in the manual feed dish, so that be placed on the paper of predefined type in the manual feed dish and transmit this paper.
Paper transfer according to the present invention is to comprise the heavy feeding detection apparatus that is used to detect multiple sheet feed and be used for the paper transfer that testing result based on heavy feeding detection apparatus stops to transmit the stop device of paper, it is characterized in that comprising the receiving device of the type that is used to accept the paper that will transmit, wherein stop device is configured to the testing result of the paper type accepted based on receiving device and heavy feeding detection apparatus and stops to transmit paper.
Paper transfer according to the present invention is characterised in that, when stop device is formed at paper type that receiving device accepts and is not predefined type, and the detection of sending in response to heavy feeding detection apparatus counterweight and stop to transmit paper.
Paper transfer according to the present invention is characterised in that the paper of predefined type is that portion has the paper of air-gap within it.
Paper transfer according to the present invention is characterised in that the paper of predefined type is any in envelope, OHP thin slice and the Kent paper.
Paper transfer according to the present invention is characterised in that and comprises the manual feed dish and be configured to transmit the paper that is placed in the manual feed dish.
Image forming apparatus according to the present invention is characterised in that the image processing system that comprises according to forming image on any and the paper that is used for transmitting at paper transfer in the paper transfer of the invention described above.
Paper transmission control method according to the present invention is to detect multiple sheet feed and stop to transmit the paper transmission control method of paper based on the testing result of heavily sending, and it is characterized in that accepting the type of the paper that will transmit and stops to transmit paper based on the paper type of accepting and the testing result heavily sent.
Paper transmission control method according to the present invention is characterised in that, is not when portion has the paper of air-gap, to stop to transmit paper in response to the detection of heavily sending within it at the paper type of accepting.
In the present invention, the testing result of the paper type accepted based on receiving device of stop device and heavy feeding detection apparatus and stop to transmit paper wherein is by heavily sending stopping to handle and can changing along with the type of paper of the paper that causes.For example, can be detecting the paper that stops to transmit predefined type when heavily sending, perhaps opposite, even detecting the paper that also can not stop to transmit predefined type when heavily sending.
In the present invention, when wherein the paper type of accepting at receiving device is not predefined type, in response to weighing the detection that the feeding detection apparatus counterweight send, stop device stops to transmit paper, even can forbid being handled and also not stopped when heavily sending transmitting detecting by stopping of causing of the detection of heavily sending to the paper of predefined type.It should be noted, also can stop heavily to inspect by ready samples survey itself to the paper of predefined type.
In the present invention, even wherein the paper of predefined type is that portion has the paper of air-gap and stops to handle owing to air-gap detects heavily to send also the paper of predefined type not to be carried out within it, this makes can prevent to carry out by what the detection of heavily sending caused and stops processing and paper can be sent to image processing system, for example, form with carries out image.The paper of portion with air-gap comprises envelope, OHP thin slice, Kent paper, WASHI etc. within it.
In the present invention; wherein the paper of predefined type be the envelope that comprises two sheet materials that overlap each other, by adding the OHP thin slice that protective sheet is made; with by in the Kent paper of making that two sheet materials are sticked together any; they all have the air-gap in two sheet materials that overlap each other, and stop to handle even detect heavily to send also the paper of predefined type not to be carried out.Therefore, can prevent to carry out by stopping of causing of the error-detecting of heavily sending and handle and paper can be sent to image processing system, for example, form with carries out image.
In the present invention, wherein be provided with the manual feed dish and the paper that is placed on the manual feed dish is transmitted, the paper of predefined type can be placed in the manual feed dish and transmit this paper.Especially, usually be such situation, that is,, envelope, OHP thin slice or Kent paper are placed in the manual feed dish in order to carry out desired transmission.
Utilize the present invention, can change along with paper type the paper that causes by multiple sheet feed stop to handle.
Utilize the present invention, even detecting the paper that does not also stop to transmit predefined type when heavily sending.
Utilize the present invention, can prevent to carry out by stopping of causing of the error-detecting of heavily sending and handle and can realize that image forms.
Utilize the present invention, the paper of predefined type can be placed in the manual feed dish and transmit this paper.
According to following detailed description and in conjunction with the accompanying drawings, will understand more fully and address further purpose and feature on of the present invention.
Description of drawings
Fig. 1 illustrates the synoptic diagram that comprises according to the total structure of the image forming apparatus of paper transfer of the present invention;
Fig. 2 is the block diagram that illustrates according to the inner structure of image forming apparatus of the present invention;
Fig. 3 is the block diagram that the structure of ultrasonic sensor is shown;
Fig. 4 is the view that an example that heavily send of recording chart is shown;
Fig. 5 is the process flow diagram that the step of the image formation processing on the recording chart is shown.
Embodiment
Below describe and to describe the present invention in detail with reference to the accompanying drawing that embodiments of the invention are shown.
Fig. 1 illustrates the synoptic diagram that comprises according to the general structure of the image forming apparatus 100 of paper transfer of the present invention.In the figure, 1 expression is the emplacing platform of being made by glass that is used to lay original copy.What be arranged on emplacing platform 1 top is to be used to transmit be placed in the auto document transport unit 2 that original copy is laid the original copy of dish on 20.What be arranged on emplacing platform 1 below is the scanner portion 3 with image reading unit 30 of the image that is used to read the original copy on the emplacing platform 1.
Image reading unit 30 has: along the lower surface of emplacing platform 1 and be parallel to the scanner section that this lower surface moves back and forth; Imaging len; CCD (charge-coupled image sensor) line sensor (these assemblies are all not shown); Or the like.Scanner section comprises: be used to light shine the original copy that is placed on the emplacing platform 1 or the light source of the original copy that transmits along paper path; Be used for to be directed to the catoptron of predetermined light paths at the light of original copy place reflection; Or the like.Imaging len is used from the pre-position of light on ccd line sensor of scanner section guiding image is provided.Ccd line sensor output is by carrying out the electric signal that opto-electronic conversion obtains to the optical imagery that is provided.Processing controls portion 43 outputs that image reading unit 30 will illustrate rearwards are by carrying out the data that color separation obtains based on the coloured image that reads from original copy to each chrominance component R (red), G (green) and B (indigo plant).The data of exporting to processing controls portion 43 are through the predetermined picture data processing.
What be arranged on scanner portion 3 belows is to be used for going up the image forming part (image processing system) 4 that forms the image that is read by image reading unit 30 at recording chart (thin slice).Image forming part 4 comprises: electrographic recording handling part 40; Fixation facility 41; Optics write section 42; Be used to take in the manual feed dish 44 of recording chart; Be used to control the processing controls portion 43 of above-mentioned electrographic recording handling part 40, fixation facility 41 and optics write section 42; Or the like.
Electrographic recording handling part 40 comprises: the photoconductor drum that is actuated to rotate; Be used to make the developing apparatus that is formed on the lip-deep latent electrostatic image developing of photoconductor drum; Be used for the lip-deep toner image of photoconductor drum is transferred to transfer apparatus on the recording chart; Or the like.Fixation facility 41 has fixing roller, and applies thermal treatment to the toner image that is transferred to and is formed on the recording chart, so as with toner image on recording chart.
Optics write section 42 comprises: be used to launch with the view data that is read by image reading unit 30 or from the semiconductor Laser device of corresponding, the modulated light of view data of inputs such as external personal computer; Be used for the polygon mirror that deflects into main scanning direction from the semiconductor Laser device emitted laser; Be used to use lens and the catoptron (all not shown) that the lip-deep image of photoconductor drum is provided by the light of polygon mirror deflection; Or the like.
What be arranged on image forming part 4 belows is multistage paper feed part 6, and it comprises the recording chart collector 61 that is used to take in recording chart that is arranged to three grades in vertical direction.Each recording chart collector 61 is taken in the recording chart of different size, makes the selected and selected recording chart of recording chart of required size be sent to electrographic recording handling part 40 and is used to form output image.
Be arranged on electrographic recording handling part 40 the paper path upstream be to be used for forming the registration roller of transfer sheet (resist roller) 45 by the numbers with image.Be arranged on the paper path between registration roller 45 and manual feed dish 44 and the multistage paper feed part 6 is ultrasonic sensor 8, it strides across the paper path subtend and places, and has and be used to launch hyperacoustic transmitter 8a and be used to receive receiver 8b from transmitter 8a ultrasonic waves transmitted.
Be arranged on the side of image forming part 4 is the preprocessor 5 that is used for recording chart is carried out aftertreatment (for example, paging, bookbinding etc.).Preprocessor 5 comprises: be used to discharge row's paper disc 51a (first pallet), the 51b (second pallet) and the 51c (the 3rd pallet) that are formed with record images paper on it; Be used for the discharge of recording chart is switched to the guides 52 and 53 of any one pallet; Be used to transmit the transfer roller 50 of the recording chart that will discharge; Or the like.
Each pallet 51a, 51b and 51c are provided with existence whether recording paper sensor 54a, 54b and the 54c that is used to detect the recording chart that is discharged to pallet, and whether and with testing result these sensors detect the existence of the recording chart on each pallet respectively and export to control part 10 (see figure 2)s.Manual feed dish 44, recording chart collector 61, pallet 51a, 51b and 51c, registration roller 45, and transfer roller 50 is positioned on paper path as paper transfer work etc.
Fig. 2 is the block diagram that illustrates according to the inner structure of image forming apparatus 100 of the present invention.Image forming apparatus 100 comprises the control part 10 such as CPU (central processing department) that is used to carry out various calculating.Control part 10 is connected with following assembly via internal bus: image reading unit 30; Storage part 11 such as HDD (hard disk drive); ROM (ROM (read-only memory)) 12; RAM (random access memory) 13; Interface portion 14; Ultrasonic sensor 8; Image processing part 15; Memory buffer 16; Image forming part 4; Operating portion 18; Or the like, and the operation of control part 10 each hardware componenies of control.
ROM 12 stores the control program of the treatment step of display control unit 10 in advance.The control program that the CPU of control part 10 will be stored among the ROM 12 is loaded among the RAM 13, makes control part 10 control the operation of image forming apparatus 100 according to the controlled step shown in the control program.Image reading unit 30 uses aforesaid ccd line sensor that the light from the original copy reflection is carried out opto-electronic conversion, so that with A/D converter the analog signal conversion that obtains is become digital signal.Image reading unit 30 is corrected the directivity characteristics of the light source when reading original copy to the digital signal that obtains by conversion under the control of control part 10, susceptibility unevenness of imageing sensor or the like, and with the image data storage that obtains in storage part 11.
Image processing part 15 is opened the data (being used for the data that image forms) that the recording chart generation is used to be controlled at the semiconductor laser of formation electrostatic latent image on the photoconductor drum surface based on the view data that is stored in the storage part 11 for each, and the data that generate temporarily are stored in the memory buffer 16.The count signal which recording chart will be the data that image processing part 15 is generated indication when generating the data that are used for image formation at every turn will be formed on is exported to control part 10.Therefore, control part 10 can determine to have generated the data that image forms that are used for of which recording chart.
Image forming part 4 based on the data that image forms that are used for that are stored in the memory buffer 16, forms image on recording chart under the control of control part 10.The transmission of recording chart is by control part 10 controls.Image forming part 4 shows which opens the output signal that forms image on the recording chart to control part 10 outputs at every turn when forming image on recording chart.Therefore, control part 10 can determine form image on which recording chart with the data that are used for image formation that generated.It should be noted that image forming part 4 is not limited to the electrographic recording mode, and can be in ink-jetting style, the thermal transfer mode etc. any.
Ultrasonic sensor (heavy feeding detection apparatus) 8 detection and location rollers 45 and from heavily the sending of the recording chart at the paper path place between the meet of the paper path of manual feed dish 44 and multistage paper feed part 6, and testing result is exported to control part 10.It should be noted, recording chart heavily send the state that is meant that two recording charts overlap each other when being transmitted, although recording chart should one by one separately be transmitted under normal conditions.
Fig. 3 is the block diagram that the structure of ultrasonic sensor 8 is shown.Ultrasonic sensor 8 comprises, for example: the oscillatory circuit 8c that is used to produce the drive waveform signal of the oscillation frequency with about 220kHz; Be used for amplifier circuit 8d that the drive waveform signal that oscillatory circuit 8c produces is amplified; The transmitter 8a that is used for the transmitted waveform drive signal; Be used to receive receiver 8b by the signal of transmitter 8a emission; Be used in the broadband (for example, detecting the resonant circuit 8e of the signal that receives by receiver 8b among the 220kHz ± 20kHz); Be used to amplify the amplifier circuit 8f of the signal that receives; Be used for the conversion of signals after amplifying is become the A/D converter circuit 8g of digital signal; Or the like.
Ultrasonic sensor 8 transmits from transmitter 8a for the recording chart that will transmit, and handle is exported to control part 10 by the detection signal that the signal that utilizes receiver 8b reception to be launched obtains, so that the number of the recording chart that will transmit based on the energy measuring of signal promptly heavily send.As ultrasonic sensor 8, for example can use by Murata Manufacturing Co. the MA200D1-1 that Ltd. makes.It should be noted, be used to detect the device that heavily send and be not limited to ultrasonic sensor, and also can use other sensor.
Control part 10 drives unshowned pickup roller in a controlled manner, so that will deliver to paper path from the recording chart of manual feed dish 44 or recording chart collector 61, and drive in a controlled manner on the paper path such as the roller of registration roller 45 and transfer roller 50 with transfer sheet.Control part 10 is also controlled unshowned guiding drive division, so that switch guides 52 and 53.For example, in order to carry out required print processing, guides 52 and 53 is switched to be discharged on the first pallet 51a being formed with record images paper on it.
Operating portion 18 is operator's control panels of touch-pad type, and comprises: the various keys and the switch that are used to accept user's operational order; And be used to show that announcement gives the LCD of user's information.Operating portion 18 shows for example error message etc. detecting when heavily sending.Operating portion (receiving device) 18 is also accepted the recording chart type that will transmit.
Interface portion 14 is from obtaining view data such as the message handler of external personal computer, and with the image data storage that obtained in storage part 11.
Fig. 4 is the view that an example that heavily send of recording chart is shown, and shown in the example in the drawings is the sequential chart that the output level of signal is surveyed in the heavily censorship when departing from alignment of end portion at two recording charts.The energy (for example, emitted energy) of the signal that is received by the receiver 8b of ultrasonic sensor 8 changes along with the number of the recording chart of signal transmission.For example, the energy of the signal that receives is E0 when not having recording chart, and the energy of the signal that receives is E1 (E0〉E1) when a recording chart is arranged, and the energy of the signal that receives is E2 (E1〉E2) when two recording charts overlap each other.
, detect next record paper and be transmitted from the moment t1 that E0 changes to E1 at the energy of signal.For example, when occurrence record paper heavily sent, the energy of signal changed to E2 at moment t2 from E1, and the energy of signal changes to E1 at moment t3 from E2.The energy level difference of the signal that receives (E1-E2) makes that can detect two recording charts is fed in two modes of sending that its end portion departs from alignment.Can also based on the transfer rate of recording chart and constantly t2 calculate with the mistiming between the t1 that recording chart departs from the length of aliging in heavily sending.
Control part 10 is based on whether coming definite existence of heavily sending from the testing result (level of detection signal) of ultrasonic sensor 8 outputs.Control part (stop device) 10 stops to transmit paper once and stop print processing based on the testing result of the type of the recording chart of being accepted by operating portion 18 (receiving device) (thin slice) and ultrasonic sensor 8, discharge recording chart then.Especially, when the recording chart type of operating portion 18 acceptance is not predefined type, control part 10 stops transfer sheet in response to the detection of heavily sending, when perhaps the recording chart type of accepting at operating portion 18 is predefined type, also do not stop transfer sheet even detect heavily to send.The recording chart of predefined type is that portion has the recording chart of air-gap within it; such as, envelope, by add and adhere to OHP thin slice that protective sheet makes, by two sheet materials are sticked together Kent paper of making or the WASHI that is distributed with air-gap therein.
Fig. 5 is the process flow diagram that the step of the image formation processing on the recording chart is shown.Control part 10 is accepted recording chart type (S10) from operating portion 18, determines whether to have made the print command (S11) of using initiating key etc. then.When also not making print command (S11:NO), control part 10 is waited for print command.
When print command is made (S11:YES), the roller of control part 10 drive arrangement on paper path etc. is with transfer sheet (S12).Control part 10 determines whether to detect heavily the sending of recording chart (S13) based on the signal of ultrasonic sensor 8.When also not detecting heavily the sending of recording chart (S13:NO), control part 10 control image forming parts 4 are to print (S14) and to have printing thereon record images paper to be discharged to pallet (for example, the first pallet 51a) (S15) on recording chart.
Control part 10 determines whether this page or leaf is last page (S16), and the processing that (S16:NO) continuation begins from step S12 when this page or leaf is not last page.When this page or leaf is last page (S16:YES), control part 10 stops image and forms processing.
On the other hand, send when detecting heavily (S13:YES) and recording chart be predefined type (for example, OHP thin slice or Kent paper) (S17:YES) time, control part 10 control image forming parts 4 are to print (S14) and to carry out after this same treatment on recording chart.When recording chart is not predefined type (S17:NO), control part 10 stops transfer sheet once, stop to print (S18) and carry out to print and stop to handle, simultaneously, discharge recording chart (S19) and on operating portion 18, carry out mistake and show to notify (S20) taken place heavily to send.
As mentioned above, when recording chart is when portion has the predefined type (envelope, OHP thin slice, Kent paper or WASHI) of air-gap, to send even detect heavily, do not stop print processing, within it so that can carry out print processing yet.
Although the foregoing description is formed at recording chart be predefined type (envelope, OHP thin slice, Kent paper or WASHI) even the time detect heavily to send and also do not stop print processing, also can when recording chart is predefined type, stop heavily to inspect by ready samples survey.In addition, the paper of its inside with air-gap is not limited to envelope, OHP thin slice, Kent paper or WASHI.
Although above-mentioned each embodiment is configured to use ultrasonic sensor as the device that detection record paper heavily send, the invention is not restricted to this, and can be constructed such that with for example optical sensor.Yet, ultrasonic sensor is relatively good aspect accuracy of detection, when use optical sensor in the length of detection record paper on the direction of transfer so that the distance between the front-end and back-end at recording chart detects under greater than the situation of the size of original copy when heavily sending, if two recording charts are overlapping fully, then equipment may not detect heavily and send.

Claims (7)

1. paper transfer comprises:
Be used to transmit the sheet feeding of paper;
Be used to accept the receiving device of the paper type that will transmit;
Be used to detect the heavy feeding detection apparatus that heavily send of paper; With
Be used for the testing result of the described paper type accepted based on described receiving device and described heavy feeding detection apparatus and stop to transmit the stop device of paper,
Wherein, when the described paper type that described stop device is accepted at described receiving device is not predefined type, stop to transmit paper in response to the detection of being undertaken by described heavy feeding detection apparatus of heavily sending; And when the described paper type that described stop device is accepted at described receiving device is described predefined type, do not stop to transmit paper even detect heavily to send by described heavy feeding detection apparatus yet.
2. paper transfer as claimed in claim 1, wherein, the paper of described predefined type is that portion has the paper of air-gap within it.
3. paper transfer as claimed in claim 1, wherein, the paper of described predefined type is any in envelope, OHP thin slice and the Kent paper.
4. paper transfer as claimed in claim 3 further comprises the manual feed dish,
Wherein said sheet feeding transmits the paper that is placed in the described manual feed dish.
5. image forming apparatus comprises:
Paper transfer as claimed in claim 1; With
Be used on the paper that transmits by described paper transfer, forming the image processing system of image.
6. paper transmission control method may further comprise the steps:
The paper type that acceptance will transmit;
Detect heavily sending of paper; With
Based on the paper type of described acceptance and the testing result heavily sent and stop to transmit paper,
Wherein, when the paper type of described acceptance is not predefined type, stop to transmit paper in response to the detection of heavily sending; And when the paper type of described acceptance is described predefined type, do not stop to transmit paper even detect heavily to send yet.
7. paper transmission control method as claimed in claim 6 wherein, is not when portion has the paper of air-gap, to stop to transmit paper in response to the detection of heavily sending within it at the paper type of described acceptance.
CNB2006101687365A 2005-12-19 2006-12-19 Sheet carrying unit, image forming apparatus and sheet carrying control method Expired - Fee Related CN100514205C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005365181A JP4173160B2 (en) 2005-12-19 2005-12-19 Image forming apparatus and sheet control method
JP2005365181 2005-12-19

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Publication Number Publication Date
CN1987669A CN1987669A (en) 2007-06-27
CN100514205C true CN100514205C (en) 2009-07-15

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